I've owned several Leupolds through the years, as well as a top of the line Redfield sniper, Zeiss, Swarovski, Bushnell, and Nikons.
My oldest scope, a Leupold VXII 3-9 is so rock solid its scary: freezing rain, snow, dropped on rocks, and NEVER lost its zero in 15 years (amazing ain't it). I also have a Leupy Long Range 8-24x on my varminter (been so long since I've had it out I may not have the power right so forgive me).....the adjustments are perfect, clarity awesome, wonderful scope. HOWEVER, I just dumped a custom rifle that had a 3.5-10 VXIII on it that was mailed back to Leupold 3 times.......fuzzy around the edges and the adjustments totally off. Each time it came back with the standard "nothing wrong" crap. FOURTH time I dropped it off in person and raised hell over it. SAME PROBLEMS upon return. Same thing with a 3-9 compact I have.
I found a friend who has a "friend" that works for Leupold......I also got to meet a rather famous shooter whom Leupold tried to get to promote their scopes: both the employee and the other person gave me the same explanation regarding Leupold's adjustments being very inconsistent in some cases. You'll find guys whacking the scopes after adjustment with rubber mallets, and some making over adjustments then bringing them back to make up for it. Leupold refuses to change their adjustment system even though there are issues. That's why you'll see many military applications using US Optics, etc.
I'll keep the Leupys I have, they work great. I bought the Zeiss and Swarovski over Leupold because of the issues above and LOVE both of them (especially the Swaro!). Like anything, you can always get a lemon......but with my two independent sources pointing to the same possible issue I would have a hard time choosing a Leupold over Zeiss or Swaro.
Regards,
RR